Polar Feedback Receiver for Modulator

1. A feedback receiver comprising: an inverse baseband magnitude component configured to generate an inverse compensated magnitude signal from a compensated magnitude signal; a first mixer component configured to combine the inverse compensated magnitude signal with a modulated radio frequency (RF) signal to generate a limited modulated RF signal; and a second mixer component configured to extract a magnitude signal plus distortion from the limited modulated RF signal.

2. The feedback receiver of claim 1 , wherein the inverse baseband magnitude component includes a gain to reverse a low frequency baseband magnitude signal.

3. The feedback receiver of claim 1 , wherein the first mixer is configured to operate as a variable gain stage to generate a limited modulated RF signal entering into a phase discriminator, wherein the phase discriminator directly extracts a phase signal plus distortion from the limited modulated RF signal.

4. The feedback receiver of claim 1 , further comprising a multi modulus divider (MMD) and a sigma delta converter configured to extract the phase distortion only from the limited modulated RF signal, wherein the MMD divides the limited modulated RF signal and the sigma delta converter removes the phase modulation.

5. The feedback receiver of claim 1 , further comprising an analog to digital converter (ADC) component and 1/M square root component, wherein the magnitude signal plus distortion includes a magnitude signal plus a square of a distortion, and the magnitude signal plus distortion is converted into digital form by the ADC component, and transformed by the 1/M square root component to obtain a magnitude distortion only.

6. The feedback receiver of claim 1 , further comprising a phase discriminator configured to extract a phase signal plus distortion from the limited modulated RF signal; and a mixer component configured to extract a magnitude signal plus distortion from the limited modulated RF signal.

7. A method of implementing a feedback receiver for linearization of a modulator comprising: inverting a magnitude of a baseband signal to an inverse magnitude of the baseband signal; and removing an amplitude modulation content of a modulated RF signal by combining the inverse magnitude of the baseband signal with the modulated RF signal to produce a limited modulated RF signal.

8. The method of claim 7 , wherein the inverting the magnitude of the baseband signal includes the use of a compensated magnitude signal.

9. The method of claim 7 , wherein the removing of the amplitude modulation content of the modulated RF signal is generated by a mixer component operating in a variable gain stage to produce the limited modulated RF signal.

10. The method of claim 7 , further comprising a multi modulus divider (MMD) and a sigma delta converter to extract the phase distortion only, wherein the MMD divides the limited modulated RF signal and removes the phase modulation through the use of a sigma to delta converter.

11. The method of claim 7 , further comprising extracting a magnitude signal plus distortion from the limited modulated RF signal, where the magnitude signal plus distortion includes a square of the distortion, converting the magnitude signal plus distortion into digital form by an ADC component, and transforming the digital magnitude signal plus distortion to obtain a magnitude distortion only.

12. The method of claim 7 , further comprising converting the inverse magnitude of the baseband signal into analog form prior to removing the amplitude modulation content.

13. The method of claim 7 , further comprising extracting a phase signal plus distortion from the limited modulated RF signal.

14. The method of claim 7 , further comprising extracting a magnitude signal plus distortion from a combination of the limited modulated RF signal and the modulated RF signal.

15. The method of claim 14 , further comprising calculating an error signal coefficient for linearization of the modulator at least partially from the magnitude signal plus distortion.